Method of producing duplicate patterns in granite



' J. HARWOOD. METHOD OF PRODUCING DUPLICATE PATTERNS'IN GRANITE.APPLICATION FILED M.AYIl,,|9|e.

1 349,955. Patented Aug- 17, 1920;

- Inver-Tmr' UNITED STATES PATENT OFFICE.

JOHN HARWOOID, 0F BEREA, KENTUCKY, ASSIGNOR OF ONE-HALF T0 01?HUNTINGT'L'EN,

JOHN D. McCOLM, VIRGINIA.

METHOD OF PRODUCING DUPLICATE PATTERNS IN GRANITE.

Application filed May 11, 1916.

To-aZZ whom it may concern:

l/Vhereas I, JOHN HARwooD, a citizen of the United States, and residentof Eerea, in the county of Madison and State of Kentucky, have inventedcertain new and useful Improvements in Methods of Producing DuplicatePatterns in Granite, of which the following is a specification.

My present invention relates to an improved method of producingduplicate patterns in granite for either building or monumentalpurposes, utilizing saws for dividing the'stock into the desired sizedblocks.

In the manufacture of certain designs of monuments and duplicatebuilding stones of granite, the usual method is to cut or finish eachindividual pattern or design from the rough quarried stone or from slabsor strips which have been sawed on one or more sides, thus requiringeach stone to be handled many times during the process of finishing. Atthe present time granite is quarried in large blocks and sawed intoslabs which must be broken to; the desired size and finished separatelyentailing a great deal of handling and waste of material in making thefinished pattern or design. The principal object of my invention is toprovide an improved method of the character described by which theobject in view may be accomplished with a minimum er;- pense and asaving of time and material in the procedure. Other objects of myinvention are to provide an improved method of the character describedutilizing chilled iron balls or shot to impinge upon the stock at theline of the desired cut and to confine the said shot to a movement in apredetermined path so that a plurality of pieces of stock may be actedupon. at the same time; and, to provide such a method by which the stockwill be protected from rust.

Further objects of my invention will appear in the following detaileddescription, taken in connection with the accompanying drawings forminga part of this specification and in which drawings:

Figure l is a side elevation of a stone carriage showing stock mountedthereupon in accordance with my invention.

Fig. 2 is an end elevation of the same.

Fig. 3 is an enlarged fragmentary plan view of a covering for the stock.

Specification of Letters Patent.

Patented Au". 17, 1920. Serial No. 96,810.

Fig. 4 is a perspective view of an elongated piece of stock.

Fig. 5 is a perspective view of a finished pattern cut from the stockshown in Fig. 4.

As to the preferred apparatus which may be used in carryingout mymethod, in the drawings, wherein similar reference cha acters refer tosimilar parts throughout the views, A designates the stock; l) asuitable support therefor; C a filler, such as cementitious material orplaster; D a covering of the cementitious material; E saws of anysuitable type; and, F, shot used when sawing.

Referring first to the stock A, it is primarily shaped into elongatedpieces, with hammered or polished sides 6, hammered tops 7, rough orhammered heads 8, and a hammered bottom 9. Such stock is placed upon thebase B, in spaced relation, with the pieces longitudinally of oneanother as clearl 1 shown in F l of the drawing. The base may consist ofa stone carriage embodying longitudinal stringers 10; a platform 11,wheels 12, carried by axles 13 received by journals 1-]: secured to theunder faces of stringers 10; and suitable braces 15 supported by andadjacent the ends of stringers l0. The saws E may be of any suitabletype, and in the example shown, reciproczble above the base 13, andadapted to feed downwardly toward the platform 11.

I prefer to mount a stone slab 16 upon the platform 11 or in other worosbelow the stock A, and upon which the stock rests.

Certain of the stocks, that designated A, having unfinished faces 17,are disposed longitudinally of the pieces A at the ends of the row madeup by the latter, these pieces A being arranged in spaced relation withrespect to the pieces A, and disposed with the unfinished faces 17outermost. Suitable abutment pieces or wedges 18 may be disposed betweenthe braces 15 and. the said faces 17 of pieces A so as to hold the mass,as hereinafter more fully described, firmly upon the base B.

After having arranged the pieces of stock in spaced relationlongitudinally of one allother, the filler C is positioned between thepieces, this filler preferably consisting of piaster or stucco, or othercementitious ma terial which may be easily placed in a plastic form andwhich in time hardens. A suitable covering D of like material is placedover the pieces, said filling and covering pref-' grooves 19 may endshort of the margin 20 of the mass preventing accidental displacement ofthe shot as the saws E impinge upon said mass.

After the plastic mass between and above the pieces of stock hashardened sufficiently to prevent the corners of stocks A and A, at thefinished faces, from breaking away, or becoming chafed off, sawing maybe proceeded with in the usual manner.

It is to be observed that the length of the pieces A and A may besubstantially the width of the saw frame and that either the base B orthe saws E may be reciprocated to accomplish the sawing. lVhen the sawsenter the faces 17 of pieces A, such faces may become broken away orchafed off, and for such reason, they are not primarily finished.

From the foregoing it is made manifest that I have invented a method ofproducing duplicate patterns in granite which will obviate the necessityof handling the steel: a considerable number of times and enable a largenumber of duplicate patterns to be produced without material waste ofthe stock.

I claim:

1. A method of producing duplicate patterns in granite which consists inprimarily shaping the stock in elongated pieces, arranging said piecesin spaced relation longitudinally of one another, placing a cementitiousfiller between the pieces and above the faces in one homogeneous mass,grooving the upper face of said mass in the lines of the desired cutswith the grooves of greater width than the subsequent saw kerfs, placingshot in said grooves, and sawing the stock and mass starting at the saidgrooves.

2. A method of producing duplicate patterns in granite, which consistsin primarily shaping some of the stocks in elongated pieces,arranging'said pieces in spaced rela tion longitudinally of oneanotl'ier, placing stock with unfinished faces outermost andlongitudinally of said first mentioned pieces at the end of the row ofthe latter, placing a cementitious filler between the pieces and abovethe faces in one homogeneous mass, grooving the upper faces of said massin the lines of the desired cuts with the grooves of greater width thanthe subsequent saw kerfs, placing shot in said grooves, and sawing thestock and mass starting at the said grooves.

3-1L method of producing duplicate patterns in granite which consists inprimarily shaping the stock in separate elongated pieces, arranging saidpieces in spaced relation longitudinally of one another, placing acementitious filler between the pieces and above the same in onehomogeneous mass, and sawing said stock and said filler.

i. A method of producing duplicate pat terns which consists in primarilyshaping the stock in elongated pieces, arranging said pieces in spacedrelation longitudinally of one another, placing a cementitious filler between the pieces and above the same in one homogeneous mass, groovingthe upper face of said mass in the lines of the desired cuts withgrooves of greater width than the subsequent saw herfs, topoints nearthe margins of said filler, placing shot in said grooves, and sawing thestool: and mass starting at the said grooves.

5. A method of producing duplicate patterns in granite, which consistsin primarily shaping some of the stock in elongated pieces, arrangingsaid pieces in spaced relation longitudinally of one another, placingstock with unfinished faces outermost and longitudinally of said firstmentioned faces at the ends of the row of the latter, placing acementitious filler between the pieces and above the same in onehomogeneous mass, grooving the upper face of said mass in the lines ofthe desired cuts with grooves of greater width than the subsequent sawlrer'fs, said grooving extending short of the margins of said filler,placing shot in said grooves, and sawing the stock and mass, starting atthe said grooves.

6. A method of producing duplicate patterns in granite, which consistsin arranging a plurality of pieces of stock in spaced relation, placinga filler therebetween, and sawing the mass.

7. A method of producing duplicate patterns in granite which consists inarranging a plurality of pieces of stock in spaced relation, placingcementitious material therebctween, and sawing the mass. V

8. A method of producing duplicate patterns in granite, which consistsin arranging a plurality of pieces of stock in spaced relation, placinga cementitious material therebetween in plastic condition, and sawingthe mass after the cementitious material hardens.

9. A method of producing duplicate patterns in granite, which consistsin primarily shaping the stock in elongated separate pieces, arrangingsaid pieces in spaced rela tion longitudinally of one another, placing afiller therebetween, and sawing the mass.

10. A method of producing duplicate patterns in granite, which consistsin primarily shaping the stock in elongated separate pieces, arrangingsaid pieces in spaced relation longitudinally of one another, placingcementitious material therebetween, and sawing the mass.

11. A method of producing duplicate pat terns in granite, which consistsin primarily shaping the stock in elongated separate pieces, arrangingsaid pieces in spaced relation longitudinally of one another, placing acementitious material therebetween in plastic condition, and sawing themass after said cenientitious material hardens.

12. A method of producing duplicate pat terns which consists inarranging elongated pieces of stock in spaced relation horizontally,placing a cementitious filler between the pieces and above the same inone homogeneous mass, and sawing the stock and mass.

13. A method of producing duplicate patterns in granite which consistsin primarily arranging separate pieces of stock in spaced relationhorizontally, placing a filler between said pieces of stock and a coverof cementitious material thereover, and sawing the mass.

14. A method of producing duplicate patterns in granite, which consistsin arranging the pieces of stock in spaced relation horizontally,placing a filler between the pieces of stock and a cover of cementitiousmatter thereover, grooving said cover in the lines of the desired cuts,grooves of greater width than the subsequent saw kerfs, placing shot insaid grooves, and sawing the mass.

15. A method of producing duplicate patterns in granite, which consistsin arranging separate pieces of stock in spaced relation horizontallyupon a bed of stone, placing a cementitious filler between the piecesand above the same in one homogeneous mass, and sawing the stock andmass.

JOHN HARWOOD.

